http://online.wsj.com/public/article_print/SB120406767043794825.htmlResearch on the impact of extending daylight-saving time across Indiana found:
- Residential electricity usage increased between 1% and 4%, amounting to $8.6 million a year.
- Social costs from increased emissions were estimated at between $1.6 million and $5.3 million per year.
- Possible social benefits -- enhanced public health and safety and economic growth -- were not studied.
"I've never had a paper with such a clear and unambiguous finding as this," says Mr. Kotchen, who presented the paper at a National Bureau of Economic Research conference this month.